4 Works

Data from: Spatial patterns and predictors of trophic control in marine ecosystems

Daniel G. Boyce, Kenneth T. Frank, Boris Worm & William C. Leggett
A key question in ecology is under which conditions ecosystem structure tends to be controlled by resource availability vs. consumer pressure. Several hypotheses derived from theory, experiments and observational field studies have been advanced, yet a unified explanation remains elusive. Here, we identify common predictors of trophic control in a synthetic analysis of 52 observational field studies conducted within marine ecosystems across the Northern Hemisphere and published between 1951 and 2014. Spatial regression analysis of...

Data from: Transatlantic secondary contact in Atlantic salmon, comparing microsatellites, a SNP array, and Restriction Associated DNA sequencing for the resolution of complex spatial structure

Ian R. Bradbury, Lorraine C. Hamilton, J. Brian Dempson, Martha J. Robertson, Vincent Bourret, Louis Bernatchez, Eric Verspoor & Brian Dempson
Identification of discrete and unique assemblages of individuals or populations is central to the management of exploited species. Advances in population genomics provide new opportunities for re-evaluating existing conservation units but comparisons among approaches remain rare. We compare the utility of RAD-seq, a single nucleotide polymorphism (SNP) array and a microsatellite panel to resolve spatial structuring under a scenario of possible trans-Atlantic secondary contact in a threatened Atlantic Salmon, Salmo salar, population in southern Newfoundland....

Data from: The potential for spatial distribution indices to signal thresholds in marine fish biomass

Emilie Reuchlin-Hugenholtz, Nancy L. Shackell & Jeffrey A. Hutchings
The frequently observed positive relationship between fish population abundance and spatial distribution suggests that changes in distribution can be indicative of trends in abundance. If contractions in spatial distribution precede declines in spawning stock biomass (SSB), spatial distribution reference points could complement the SSB reference points that are commonly used in marine conservation biology and fisheries management. When relevant spatial distribution information is integrated into fisheries management and recovery plans, risks and uncertainties associated with...

Data from: The role of a dominant predator in shaping biodiversity over space and time in a marine ecosystem

Kari Elsa Ellingsen, Marti J. Anderson, Nancy L. Shackell, Torkild Tveraa, Nigel G. Yoccoz & Kenneth T. Frank
1. Exploitation of living marine resources has resulted in major changes to populations of targeted species and functional groups of large-bodied species in the ocean. However, the effects of overfishing and collapse of large top predators on the broad-scale biodiversity of oceanic ecosystems remain largely unexplored. 2. Populations of the Atlantic cod (Gadus morhua) were overfished and several collapsed in the early 1990s across Atlantic Canada, providing a unique opportunity to study potential ecosystem-level effects...

Registration Year

  • 2015
    4

Resource Types

  • Dataset
    4

Affiliations

  • Bedford Institute of Oceanography
    4
  • Dalhousie University
    2
  • The Arctic University of Norway
    1
  • University of Oslo
    1
  • Fisheries and Oceans Canada
    1
  • University of the Highlands and Islands
    1
  • Queen's University
    1
  • Norwegian Institute for Nature Research
    1
  • Universit√© Laval
    1
  • Massey University
    1